Xerox 8500DN Service Manual - Page 169

General Troubleshooting This procedure performs a "4 corner" test using the minimum and maximum velocity and acceleration used during printing and minimum and maximum load for a total of eight test cycles. Measures servo response parameters under various conditions. Y-Axis Drive R# Definition Typical Value (8400) Typical Value (8500/ 8550/8560) Actions 0 HAHVN CCW 4000 to Average Fe (mpts) 5700 4000 to 5800 Reports average following error during the last half of the first period. 1 HAHVN CCW Fe Ripple (mpts) 100 to 380 0 to 500 Reports following error ripple during the last half of the first period. 2 HAHVN CW -5200 to -5500 to Average Fe (mpts) 3800 -4000 Reports average following error during the last half of the second period. 3 HAHVN CW Fe Ripple (mpts) 80 to 380 75 to 350 Reports following error ripple during the last half of the second period. 4 HAHVN Start Fe Settle time (sec) 0.08 to 1.0 .05 to 0.2 Reports the time following the start of motion for the Fe value to enter the CCW ripple band. 5 HAHVN Reverse Fe 0.17 to 1.1 .12 to .3 Settle time (sec) Reports the time following the start of motion reversing that it takes the following error value to enter the CW ripple band. 6 HAHVN Stop Fe Settle time (sec) -.001 to 0.15 -.001 to .30 Reports the time following the start of motion stopping that it takes the following error value to enter the idle ripple band. 7 HAHVN Delta Print 0.02 to Velocity Settle Time 0.10 (sec) 0 to .11 Reports the time following the start of motion that it takes YAxis delta velocity to enter the CCW delta velocity ripple band. Phaser 8400/8500/8550/8560 Color Printer Service Manual 4-39